A through hole formation method and a substrate provided with a through hole
    34.
    发明公开
    A through hole formation method and a substrate provided with a through hole 失效
    一种用于通孔的制造方法,以及具有这样的通孔的硅衬底

    公开(公告)号:EP0886307A3

    公开(公告)日:1999-10-27

    申请号:EP98111247.7

    申请日:1998-06-18

    Inventor: Ohkuma, Norio

    Abstract: A method of Si anisotropic etching makes it possible to relax the restrictions imposed upon the processing configuration of an Si substrate provided with the 〈100〉 plane orientation. This Si anisotropic etching method can be preferably used for the formation of the ink supply opening of an ink jet head, for example. When an Si material (Si substrate) having the 〈100〉 crystal plane orientation is processed by this anisotropic etching method, it is arranged to give heat treatment to such Si material in advance before etching. Thus, the processed section can be obtained in a bent configuration formed by the two 〈111〉 planes of crystal plane orientation. Therefore, the etching initiation surface is made smaller than that needed for the conventional art even when the same width should be obtained for a penetrating process, hence making a chip smaller accordingly for the reduction of costs.

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